Portable storage box



FIG. 1 is a front, top and right side perspective view of a portable storage box, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a top and left perspective view, in a closed configuration thereof;

FIG. 9 is a top and right perspective view thereof;

FIG. 10 is a top and front perspective view thereof; and,

FIG. 11 is a top and rear perspective view thereof. 

CLAIM The ornamental design for a portable storage box, as shown and described. 